How to ignore inserting records from a table to another table when both table field has same value in MySQL?

I have 2 tables which have names and emails. Now I want to merge these tables into a new table without duplicate records. I want to use email fields for avoiding duplicate values in both tables. I heard INSERT IGNORE query is using for inserting values into a table without affecting existing records. How to write INSERT IGNORE query to check email field for duplication checking. If anyone knows other methods are also welcome.